newlib/libc/stdio/sniprintf.c

   1 /*
   2  * Copyright (c) 1990, 2007 The Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms are permitted
   6  * provided that the above copyright notice and this paragraph are
   7  * duplicated in all such forms and that any documentation,
   8  * and/or other materials related to such
   9  * distribution and use acknowledge that the software was developed
  10  * by the University of California, Berkeley.  The name of the
  11  * University may not be used to endorse or promote products derived
  12  * from this software without specific prior written permission.
  13  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  14  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  16  */
  17
  18 /* This code created by modifying snprintf.c so copyright inherited. */
  19 /* doc in siprintf.c */
  20
  21 #include <_ansi.h>
  22 #include <reent.h>
  23 #include <stdio.h>
  24 #include <stdarg.h>
  25 #include <limits.h>
  26 #include <errno.h>
  27 #include "local.h"
  28
  29 int
  30 _sniprintf_r (struct _reent *ptr,
  31         char *str,
  32         size_t size,
  33         const char *fmt, ...)
  34 {
  35   int ret;
  36   va_list ap;
  37   FILE f;
  38
  39   if (size > INT_MAX)
  40     {
  41       _REENT_ERRNO(ptr) = EOVERFLOW;
  42       return EOF;
  43     }
  44   f._flags = __SWR | __SSTR;
  45   f._flags2 = 0;
  46   f._bf._base = f._p = (unsigned char *) str;
  47   f._bf._size = f._w = (size > 0 ? size - 1 : 0);
  48   f._file = -1;  /* No file. */
  49   va_start (ap, fmt);
  50   ret = _svfiprintf_r (ptr, &f, fmt, ap);
  51   va_end (ap);
  52   if (ret < EOF)
  53     _REENT_ERRNO(ptr) = EOVERFLOW;
  54   if (size > 0)
  55     *f._p = 0;
  56   return (ret);
  57 }
  58
  59 #ifndef _REENT_ONLY
  60
  61 int
  62 sniprintf (char *str,
  63         size_t size,
  64         const char *fmt, ...)
  65 {
  66   int ret;
  67   va_list ap;
  68   FILE f;
  69   struct _reent *ptr = _REENT;
  70
  71   if (size > INT_MAX)
  72     {
  73       _REENT_ERRNO(ptr) = EOVERFLOW;
  74       return EOF;
  75     }
  76   f._flags = __SWR | __SSTR;
  77   f._flags2 = 0;
  78   f._bf._base = f._p = (unsigned char *) str;
  79   f._bf._size = f._w = (size > 0 ? size - 1 : 0);
  80   f._file = -1;  /* No file. */
  81   va_start (ap, fmt);
  82   ret = _svfiprintf_r (ptr, &f, fmt, ap);
  83   va_end (ap);
  84   if (ret < EOF)
  85     _REENT_ERRNO(ptr) = EOVERFLOW;
  86   if (size > 0)
  87     *f._p = 0;
  88   return (ret);
  89 }
  90
  91 #endif